EXPLANATION OF PLATE XX. 



Fig. 1-7. Paleosyops paludosus. Figures one-half size. 



Fig. 1. Tibia of the right side, front view. From Grizzly Buttes. Hayden's collection 



of 1870. 

 Fig. 2. Calcaneum, npper view. Found by Dr. Corson on Smith's Fork of Green Eiver. 

 Fig. 3. Astragalus, upper view. Found by Dr. Carter near Millersville. 

 Fig. 4. Cuboid, scaphoid, and external cuneiform. From Church Buttes. Hayden's collection. 

 Fig. 5. Metatarsal. Found by Dr. Corson near Fort Bridger. 

 Fig. 6. First phalanx. Found by Dr. Carter on Henry's Fork of Green Eiver. 

 Fig. 7. Second phalanx. Found by Dr. Carter near Fort Bridger. 



Fig. 8. Pal^osyops major : 



Portion of the right ramus of a lower jaw, one-half size. The specimen is somewhat swollen 

 and altered in character from disease, and is one of those upon which the species was first 

 indicated. Discovered by Dr. Carter at Grizzly Buttes. 



Figs. 9-11. Merycochoerus rusticus. Natural size. From Hayden's collection of the Sweetwater 

 Eiver. 



Fig. 9. Lower extremity of the right tibia, front view. 

 Fig. 10. Astragalus of the right side, upper view. 

 Fig. 11. Calcaneum of the right side, upper view. 



Fig. 12. Merycochcerus(?) Natural size. 



Lower end of the right tibia of a smaller species than the preceding, with the specimens of 

 which it was found. 



Fig. 13. Hipparion(?) Natural size. 



Eight cuneiform bone, upper view, of a small equine animal. Specimen found with the 



remains of Merycochoerus just indicated. 

 Figs. 14-22. Eemains from Texas, submitted to examination by Professor S. B. Buckley. 



All of the natural size. 



Fig. 14. HlPPARION SPECTOSUM (?) 



Last upper molar of the right side ; view of the triturating surface. From Washington 

 County. 



Fig. 15. Hipparion (?) 



A third or fourth upper molar of the left side. Found with the preceding specimen. 



Fig. 16. Protohippus perditus(?) 



A second or third upper molar of the right side. From Independence, Washington County. 



Figs. 17, 18. Protohippus placidus(?) 



Fig. 17. A third or fourth upper molar of the right side. Found in association with the 



specimens of Figs. 14, 15. 

 Fig. 18. A first upper molar of the right side, probably of the same species as the former. 

 From Bastrop County. 



Fig. 19. Anchitherium(?) australe: 



First upper molar of the right side. Found in association with the specimen of Fig. 16. 



Fig. 20. Protohippus : 



A lower molar of the right side. From Navarro County. 



